Hisab Awal Bulan Kamariah dari Kitab Sulamun Nayyirain bagian 2

Summary

This video delves into the detailed calculations for determining the lunar calendar's conjunction of the Sun and Moon (Ijtimak) based on the 'Surlamun' book by Syekh Muhammad Mansur Al Batawi. The tutorial walks viewers through the step-by-step process of calculating Takdir Kosong (empty prediction) and Takdir Markas (central point), explaining the use of both manual methods and Excel formulas for precise results. Additionally, it covers how to calculate the position of the Sun and Moon, how to adjust for local coordinates, and concludes with a demonstration of how to predict the exact time of Ijtimak for specific locations, such as Bojonegoro, Indonesia.

Takeaways

• 😀 The video focuses on calculating the Islamic lunar calendar, particularly the Ijtimak (conjunction) of the sun and moon, based on the Surlamun book by Sheikh Muhammad Mansur Al Batawi.
• 😀 The first step in the calculation is to determine the Takdir Kosong, which is based on a table and involves several parameters like degree and minute values for the sun and moon.
• 😀 When calculating Takdir Kosong, specific values are extracted, and in some cases, if values are the same, the calculation becomes simpler, which is advantageous for manual calculations.
• 😀 For more accurate calculations in programming or Excel, the use of formulas is introduced, ensuring that values are consistently calculated and can be reused for other times.
• 😀 The calculation process involves determining the Takdir Markas, which is based on the sun’s position in the sky, and making adjustments based on specific tabulated values.
• 😀 The video explains that using manual calculations can simplify the process, as identical values don’t need to be recalculated every time, making it efficient.
• 😀 The Takdir for the sun and moon is expressed in degrees, minutes, and seconds, and formulas are provided to convert decimal values into this format for precision.
• 😀 The video shows how to incorporate tables to adjust the Takdir for specific locations, and the significance of the timing of the sun and moon conjunction in Islamic calendar calculations.
• 😀 There is also a discussion of the role of local geographical coordinates, such as longitude and latitude, in adjusting the calculations to the local time and location.
• 😀 The script concludes by explaining the final calculation for the Ijtimak in a specific location, like Jakarta, showing how the time of the conjunction is computed and adjusted to local time.

Q & A

What is the main focus of the video?

The video focuses on explaining the calculation of the initial phase of the lunar calendar (hisab awal bulan Qomariah) from the Surlamun book by Sheikh Muhammad Mansur Al Batawi.

What is the first step in the calculation process?

The first step is determining the 'takdir kosong' value through a table, which is derived from specific values of degrees and minutes.

What does 'takdir kosong' refer to in the calculation?

'Takdir kosong' refers to a specific calculated value based on the degree and minute values derived from the table to initiate the lunar calendar computation.

Why is the 'takdir kosong' calculation simplified if the values are the same?

If the values for 'takdir kosong' are the same, the calculation is simplified, as no further steps are needed to compute different results. This makes the process more efficient.

How are the degree, minute, and second values converted into a more usable format?

The degree, minute, and second values are converted into decimal format using formulas involving division by 60 and 3600, respectively. This allows the values to be more easily manipulated in calculations.

What role does Excel play in this calculation process?

Excel is used to automate the calculation process. When dealing with different values or tables, Excel formulas ensure accurate results without requiring manual recalculation each time.

What is the significance of 'takdir markas' in the calculation?

'Takdir markas' represents another key value used in the calculation, which is determined from specific tables and contributes to the overall computation of the lunar calendar.

What happens when 'takdir markas' and 'takdir kosong' values match?

When the values of 'takdir markas' and 'takdir kosong' match, the calculation becomes more straightforward, and the result does not require further modifications.

What is the purpose of 'ijtima' in this process?

The 'ijtima' refers to the moment of conjunction between the sun and the moon, which is a crucial point in determining the start of the Islamic lunar month.

How does the calculation of 'ijtima' adjust based on the location?

The calculation of 'ijtima' is adjusted based on the location's longitude and latitude, with the example provided in the video for Bojonegoro, using the appropriate longitude for the location in the calculation.